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Senior Software Engineer

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If youre a close but not exact match with the description, we hope youll still consider applying. Want to learn more about life at Klaviyo? Visit careers.klaviyo.com to see how we empower creators to own their own destiny.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech
 
We love tackling tough engineering problems and look for Senior Full Stack Engineers who specialize in certain areas but are passionate about building, owning & scaling features end to end from scratch and breaking through any obstacle or technical challenge in their way. We push each other to move out of our comfort zone, learn new technologies and work hard to ensure each day is better than the last.
 
Klaviyo operates a real-time data platform coded in Python built for massive scale on Amazon Web Services (AWS). Engineers come to Klaviyo with experience in a variety of languages and from a number of disciplines.
 
Technologies we use (not exhaustive):
  • Python, Django, Celery
  • MySQL, Cassandra, RabbitMQ, Redis
  • HTML, JavaScript, LESS, Backbone.js, React
  • Amazon Web Services (EC2, RDS, Aurora, etc.)Terraform, Ansible, Packer, and other DevOps tools

How you will make a difference:

  • Wholly own features that thousands of our customers rely on daily to reach 100,000,000+ of consumers to drive their business forward
  • Work on crafting our highly scalable real-time data pipeline that processes billions of events monthly across data sets growing to petabyte scale
  • Be empowered to own the mission, technical direction and operations of projects that have immediate impact
  • Advance your technical skills in all facets ranging from front end web development and user experience to machine learning and massively parallelized data pipelines
  • Contribute to the company as a subject matter expert in multiple areas, constantly pushing yourself to be a better engineer and to level up all of your peers within your team and within Klaviyo

Who you are:

  • Have experience building products that matter and pushing yourself and your team to be better engineers and build a product with passionate advocates
  • Enjoy working with new technologies ranging from the frontend to backend, and are particularly passionate and an expert in multiple stack areas. You show this by having strong and opinionated experience with various technologies and know how to pick the right tool for any job
  • Love digging into performance and scalability issues to drive breakthrough solutions-- whether it's a slow loading UI or too many clicks in a workflow, a database query timing out, or a queue that just wont drain. You recognize all problems can be solved
  • Enjoy shipping code early & often in an agile fashion, pairing with product management to craft better software by soliciting feedback from thousands of end users
  • Like working on small, autonomous agile teams. At Klaviyo, you will have ownership of features, but you'll collaborate with everyone to make sure we produce the right solution

Get to Know Klaviyo

Klaviyo is a world-leading marketing automation platform dedicated to accelerating revenue and customer connection for online businesses. Klaviyo makes it easy to store, access, analyze and use transactional and behavioral data to power highly-targeted customer and prospect communications. The company's hybrid customer-data and marketing-platform model allows companies to grow by fostering direct relationships with customers, without giving up their valuable data to popular big-tech ad platforms. Over 265,000 innovative companies like Unilever, Custom Ink, Living Proof and Huckberry sell more with Klaviyo. Learn more at www.klaviyo.com.

If you are a California, Colorado, Rhode Island, Washington, New York City, or Jersey City resident and this role is a remote role, you can receive additional information about the compensation and benefits for this role, which we will provide upon request. Requests can be submitted here. Additional information regarding benefits can be found at klaviyorewards.com.

Klaviyo is committed to diversity and to a policy of equal employment opportunity and non-discrimination. We do not discriminate on the basis of race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation or any other characteristic protected by applicable law.

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Klaviyo

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Klaviyo is a unified customer platform for email, SMS, and more. Own your consumer data and interactions.

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Company Profile

Number of Employees

1,000+ Employees

Open Positions

34

Location(s)

Boston, MA

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Klaviyo Culture

Employee Testimonials

“At Klaviyo, we always make sure to align our vision with what our customers are striving to achieve: I believe that’s what being customer-first truly means. We care deeply about our customers and make sure we build empathy to better understand them and witness how they change the world for the better.”

Burcu Bodur   –   Customer Success Manager

“We surround ourselves with people that are intensely curious and energized by learning. I know many Klaviyos who have attended Udemy courses, coding academies, conferences, and university classes to better themselves and I know others that have independently launched internal trainings and mentoring programs to help teach others. It helps that we have a free book policy and generous learning stipend but what makes Klaviyo really special is the culture of putting this into action."

Mike Parker   –   Sr. Director, Solution Architecture

“Klaviyos come from all over the world, and have all kinds of backgrounds. We have a number of employee-organized groups called KRGs that celebrate our different backgrounds, identities, and values. Because wherever you're from, you belong here.”

Hansen Liang   –   Senior Product Manager

“I came to Klaviyo to work on the brand refresh: this project would have not been possible without our culture of radical collaboration. It is so rewarding to be part of a creative team that solves problems together with consistent communication, constant iteration, and the desire to do our best work.”

Angela Weidmann   –   Producer

“Klaviyos dream big and are passionate. We don't back down from challenging problems. We don't fear failing. We strive to succeed and build success for those around us. We don't limit our thinking to "what we've always done." We are builders and we create opportunities.”

Daniel Kezerashvili   –   Engineer Manager II

“I am always impressed by the unique skills and talents held by people at Klaviyo and the drive Klaviyos possess to go above and beyond. By bringing their best to work everyday in meaningful and noticeable ways, Klaviyos inspire others to do the same.”

Evan Eisert   –   Group Product Manager
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